メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377369886444 43.7603059280829, 142.377668679155 43.7608877003447, 142.376598699487 43.7611931090006, 142.376177022158 43.7613134703495, 142.375871106389 43.7607406831796, 142.3755658006 43.7601742430502, 142.376008626961 43.7600383556744, 142.377048310624 43.7597359749025, 142.377369886444 43.7603059280829)) ^^http://www.opengis.net/ont/geosparql#wktLiteral